157988738069 has 8 divisors (see below), whose sum is σ = 159625706520. Its totient is φ = 156351937536.

The previous prime is 157988738059. The next prime is 157988738071. The reversal of 157988738069 is 960837889751.

It can be written as a sum of positive squares in 4 ways, for example, as 1420536100 + 156568201969 = 37690^2 + 395687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157988738069 - 2²⁰ = 157987689493 is a prime.

It is a super-2 number, since 2×157988738069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157988737993 and 157988738011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157988738059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936987 + ... + 2990295.

It is an arithmetic number, because the mean of its divisors is an integer number (19953213315).

Almost surely, 2^157988738069 is an apocalyptic number.

It is an amenable number.

157988738069 is a deficient number, since it is larger than the sum of its proper divisors (1636968451).

157988738069 is an equidigital number, since it uses as much as digits as its factorization.

157988738069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83959.

The product of its (nonzero) digits is 182891520, while the sum is 71.

The spelling of 157988738069 in words is "one hundred fifty-seven billion, nine hundred eighty-eight million, seven hundred thirty-eight thousand, sixty-nine".